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Health and Movement Science Year 12 · Module 4 · Training for improved performance
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Lesson 18 · Recovering for what?

Recovery strategies: physiological and psychological

Two athletes get into the same ice bath after the same hard session. For one of them it is a sound decision and for the other it works against the entire purpose of the block they are in. Nothing about the bath differs. What differs is what each of them is trying to achieve.

Syllabus focus. Inquiry question: How do individuals train for sustained movement and performance? This lesson addresses the dot point: Justify recovery strategies used for sustained movement and performance; covering the sub-points physiological, including cool-down, hydrotherapy, and psychological, including relaxation.
01
Think first, your gut answer
warm-up

Two athletes finish the same hard session and both get into an ice bath. One is a footballer with a second match in 36 hours. The other has just completed a heavy resistance session in the middle of a strength-building block, with nothing to compete in for two months.

Write down whether you think the ice bath is a good idea for each of them. Then answer the question that the whole lesson turns on: what is each athlete actually trying to achieve, and could the same strategy help one and work against the other?

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02
What you'll master
intentions
  • State what recovery is for, and distinguish restoring readiness from producing adaptation.
  • Describe the physiological strategies, including the cool-down and hydrotherapy, and the mechanism claimed for each.
  • Describe the psychological strategies, including relaxation, and explain what they contribute that physical strategies cannot.
  • Explain why cold-water immersion can help one athlete and work against another.
  • Justify a choice of strategy, which means giving the reason, the evidence, the cost and the context — not simply naming it.
03
Key terms
vocabulary
  • Recovery — the processes that return an athlete towards readiness after training or competition.
  • Adaptation — the longer-term change produced by training, which requires the disturbance training causes.
  • Active recovery — light exercise performed to aid recovery rather than to train.
  • Cool-down — a graded reduction in intensity after the main work, usually followed by stretching.
  • Hydrotherapy — the use of water for recovery, including cold, hot and contrast immersion.
  • Cold-water immersion — immersion in cold water, commonly called an ice bath.
  • Contrast therapy — alternating hot and cold immersion.
  • Delayed onset muscle soreness — muscle soreness developing in the day or two after unfamiliar or heavy eccentric work.
  • Relaxation — deliberate reduction of physiological and psychological arousal, through breathing, progressive muscular relaxation or meditation.
  • Psychological detachment — deliberately disengaging from sport between sessions.
  • Readiness — the athlete's capacity to perform well in the next session or contest.
04
Recovery has two different jobs, and they can conflict
core concept

Training works by disturbing the body and then allowing it to rebuild — that was the whole argument of Lessons 6 and 8. So recovery is not simply "getting rid of the effects of training". It has two jobs, and they do not always point the same way.

The two jobs of recovery
JobWhat it meansWhen it dominates
Restore readiness Return the athlete to a state in which they can perform well again as soon as possible Congested fixtures, tournaments, multi-day events, two sessions in a day, and the in-season phase generally
Allow adaptation Let the body complete the rebuilding that the training stimulus initiated, which takes time and requires the disturbance to run its course Pre-season and any development block, where the point of the session was to change the athlete rather than to perform

Hold those two apart and a great deal becomes clear. A strategy that speeds the return to readiness by damping the body's response to training may, in doing so, reduce the adaptation that response was going to produce. That is not a paradox; it is a trade, and the right side of the trade depends on what the athlete needs this week.

It also explains why the foundations come first. Sleep, nutrition and hydration from Lesson 15 are the recovery strategies with the largest effects, and everything in this lesson is a refinement on top of them. An athlete sleeping six hours who takes an ice bath has purchased a small effect while ignoring a large one — the same opportunity-cost argument that closed Lesson 16.

Ask what the athlete needs: to be ready again quickly, or to adapt. The best recovery strategy is different for those two answers, and sometimes opposite.

In your book. Write the two jobs as two headings and file every strategy in this lesson under the one it serves, marking any that serve both. Then write the foundation sentence: sleep, nutrition and hydration first; everything here is a refinement.

Quick check: Why can a recovery strategy that speeds the return to readiness sometimes reduce the benefit of a training block?

05
Physiological strategies: cool-down and hydrotherapy
core concept

The syllabus names two physiological strategies specifically — the cool-down and hydrotherapy — so both need a mechanism and an honest account of the evidence.

Physiological recovery strategies
StrategyMechanism claimedWhat the evidence supportsCost or limitation
Cool-down, with stretching Light activity maintains the muscle pump and venous return so blood does not pool, supports clearance of metabolic by-products, and returns the body gradually towards rest The circulatory argument and the gradual return are well founded, and the cool-down is a reliable moment for feedback and psychological transition The claim that it prevents next-day soreness is overstated, since delayed onset muscle soreness arises mainly from mechanical damage in eccentric work rather than from lactate
Active recovery, the following day Light aerobic work maintains blood flow to damaged tissue without adding meaningful load Athletes generally report feeling better, and it maintains routine and movement quality Easy to do too hard, at which point it stops being recovery and becomes another session
Cold-water immersion Cold causes vasoconstriction and reduces tissue temperature, limiting the inflammatory response and swelling; the water's pressure may also assist fluid movement Reasonably consistent reduction in perceived soreness and fatigue in the day or two afterwards, which is genuinely useful between congested fixtures Uncomfortable, requires facilities, and — the important one — regular use after resistance training appears to reduce the adaptation that training produces
Hot immersion Heat increases blood flow and tissue extensibility, and is relaxing Useful for comfort, for relaxation and before mobility work Not appropriate on an acute injury, where it would increase swelling, as Lesson 21 sets out
Contrast therapy Alternating hot and cold produces repeated vasodilation and vasoconstriction, described as a pumping action on fluid movement Athletes commonly report feeling better; the evidence for an effect beyond that is weaker than for cold alone Needs two facilities and considerable time, so its practical cost is high relative to its demonstrated benefit

The third row is the one to understand properly, because it is where the two jobs of recovery collide. Cold-water immersion works partly by blunting the inflammatory response to training — and that response is part of the signal that drives adaptation. So the same mechanism that makes an athlete feel better tomorrow can reduce what a strength block achieves over months. This is why the answer to card 01 is genuinely different for the two athletes: for the footballer with a match in 36 hours, readiness is what matters and the trade is worth making; for the strength athlete mid-block, adaptation is the entire point and damping it is self-defeating.

Feeling better is not the same as recovering better

Most recovery strategies are evaluated on how the athlete says they feel, and perceived recovery is a real and useful outcome — an athlete who feels fresher will train better. But it is not the same as a measured restoration of performance, and it is especially vulnerable to expectation. When you justify a strategy, say which of the two you are claiming.

In your book. Copy the table but replace the last two columns with your own one-line summary of each. Then write the cold-water immersion trade in a single sentence, with the word readiness on one side and adaptation on the other.

True or false: Regular cold-water immersion after resistance training can reduce the adaptation that training produces, because it blunts part of the inflammatory response that signals adaptation.

06
Psychological recovery, and what it does that physical strategies cannot
core concept

The syllabus names psychological recovery as a category in its own right, including relaxation, and it is not decoration. Fatigue is not only muscular. After a hard week an athlete may be perfectly capable of producing force and still perform poorly, because attention, motivation and emotional regulation are depleted — and no amount of ice will restore those.

Psychological recovery strategies
StrategyMechanismBest used
Relaxation: breathing control, progressive muscular relaxation Directly lowers physiological arousal, reducing heart rate and muscle tension, which also helps the transition into sleep In the hours after evening competition, when arousal is high and sleep is the priority
Meditation and mindfulness Trains attention to disengage from rumination about performance, which is a major obstacle to rest after a loss or an error As a rehearsed practice, since like every strategy in Lesson 12 it does not work if introduced on the day it is needed
Psychological detachment Deliberate disengagement from sport between sessions, so recovery is genuinely restorative rather than spent replaying the game Across a long season, and after competition, where it is a strong predictor of feeling recovered
Social connection and time away Restores motivation and reduces the sense of sport as a total obligation During long in-season blocks and in the off-season, where it protects against the disengagement that ends participation
Debrief, then close it A structured coach and athlete review, as in Lesson 10, so the athlete stops carrying an unresolved performance Soon after competition, since an unclosed performance is exactly what rumination feeds on

Two of these overlap with earlier lessons in a way worth noticing. Relaxation appeared in Lesson 12 as an arousal-management strategy before competition; here it appears as a recovery strategy after it. Same tool, same mechanism, different purpose. And the debrief row is Lesson 10's evaluation doing a second job: the reason to close a performance is not only to learn from it, but so the athlete can stop thinking about it.

The strongest practical point is the link to sleep. Arousal after an evening game is the single most common reason athletes sleep badly on the most important night of the week, so a psychological strategy that lowers arousal is also a nutrition-and-sleep strategy — which is the interconnection of Lesson 15 arriving from a different direction.

In your book. Write one line on why an athlete can be physically capable and still perform poorly. Then list the five psychological strategies with the mechanism for each, and draw an arrow from relaxation to your Lesson 15 sleep page.

Fill the gaps. The use of water for recovery, including cold, hot and contrast immersion, is called . Deliberately disengaging from sport between sessions is called psychological . Light exercise performed to aid recovery rather than to train is called .

07
What justify requires, and it is not a description
core concept

The verb in this dot point is justify. Describing a strategy answers a different question. A justification argues that this strategy is the right choice for this athlete in this situation, and that has four parts.

The four parts of a justification
PartThe question it answersWeak versionStrong version
Purpose What is this athlete trying to achieve right now? "To recover" "To be able to play again in 36 hours, accepting some cost to adaptation, because the next fixture is what matters this week"
Mechanism By what process would this strategy achieve it? "Ice baths help you recover" "Cold causes vasoconstriction and lowers tissue temperature, limiting swelling and reducing perceived soreness in the following day or two"
Evidence How well supported is that, and what exactly was measured? "Professional teams use it" "The effect on perceived soreness and fatigue is reasonably consistent; the effect on measured performance is smaller and less certain"
Cost and alternative What does it cost, and what else could be done with that time? Not mentioned "It needs facilities and is uncomfortable, and it blunts adaptation if used routinely; an extra hour of sleep is free and has a larger effect, so this is for congested weeks rather than every session"

Read the right-hand column downwards and you have a complete answer to any justify question this dot point can ask. Notice that the fourth row is where most marks are lost: a justification that never mentions a cost or an alternative is an advertisement, not an argument, and the strongest thing a student can write about most recovery strategies is that the free ones are the ones that matter most.

Purpose, mechanism, evidence, cost and alternative. If your answer has no cost in it, you have described a strategy rather than justified it.

In your book. Take three strategies from this lesson and write all four parts for each. Then reread the fourth part and check that you have named a real alternative, not just a drawback.

Odd one out. Three of these belong in a justification of a recovery strategy. Which one does not?

08
Building a recovery plan in the right order
synthesis

Put the lesson together and recovery becomes a hierarchy rather than a menu. Strategies are added in order of the size of their effect and the cost of applying them, and almost nobody does this in the right order.

The hierarchy, largest effect first
TierStrategyEffect and cost
1 Sleep, in duration and consistency The largest effect available, and it is free. This is where Lesson 15 lives, and no strategy below compensates for its absence
2 Nutrition and rehydration after the session Large, cheap, and the more urgent the sooner the next effort is, as in Lesson 14
3 Training load management itself Not usually thought of as recovery, but reducing an unnecessary session recovers more than anything that can be done after it
4 Cool-down, active recovery and psychological detachment Modest effects, very low cost, and they carry secondary benefits in feedback, routine and motivation
5 Hydrotherapy and other targeted strategies Smaller and more situational effects at a real cost in time, facilities and, for cold immersion, potentially in adaptation

Two consequences follow. First, an athlete who reaches tier 5 while tier 1 is unaddressed has an ordering problem rather than a recovery problem, and telling them so is a better intervention than any of these strategies. Second, tier 5 becomes genuinely valuable in exactly the circumstances where tiers 1 to 3 cannot be improved: a tournament with fixed fixtures, an overnight turnaround, a finals series. The strategies at the bottom of the hierarchy earn their place when the ones at the top are already maximised and the schedule cannot change.

That is also the honest answer to card 01. The footballer's schedule is fixed and readiness is everything, so a strategy that trades a little adaptation for feeling better in 36 hours is defensible. The strength athlete has two months, no fixture, and adaptation as the entire purpose of the block, so the same strategy is working against the thing they came to do.

In your book. Copy the five tiers. Beside each write effect and cost in two or three words. Then write the two consequences underneath, because together they are a complete answer to "should this athlete use an ice bath?".

Two truths and a lie. One of these statements is false. Find it.

Recovery is a hierarchy, and the free strategies are at the bottom 1 · Sleep: duration and consistency largest effect, free 2 · Nutrition and rehydration large, cheap 3 · Training load management the session not done 4 · Cool-down, detachment modest, very low cost 5 · Hydrotherapy small, situational, real cost reaching tier 5 while tier 1 is unaddressed is an ordering problem, not a recovery problem The same strategy, two athletes, two answers Match in 36 hours purpose is readiness, and the schedule cannot be changed cold immersion is defensible Strength block, no fixture for two months purpose is adaptation, and the session existed to change the athlete cold immersion works against the goal
Above, the hierarchy: the strategies with the largest effects are also the cheapest, and the ones at the top of the pyramid earn their place only when everything below is already maximised and the schedule cannot change. Below, the trade that makes this dot point a justify rather than a describe: the same ice bath is a good decision for one athlete and a bad one for the other, and only the purpose tells you which.
09
Activity 1 · Four parts, four athletes
activity

For each athlete, choose a strategy and justify it using all four parts: purpose, mechanism, evidence, and cost with an alternative.

1

A netballer with three matches across two days of a carnival, sleeping in a shared cabin.

2

A 17-year-old in week four of a twelve-week off-season strength block, feeling sore but with no competition scheduled.

3

A footballer who cannot sleep after night matches and is flat for the next two days.

4

A distance runner in round 14 of a long season who says they are "sick of it" and are considering stopping.

Match each term to its meaning.

  • Hydrotherapy
  • Contrast therapy
  • Psychological detachment
  • Readiness
  • The use of water for recovery, including cold, hot and contrast immersion
  • Alternating hot and cold immersion
  • Deliberately disengaging from sport between sessions
  • The athlete's capacity to perform well in the next session or contest
10
Activity 2 · Audit the recovery protocol
activity

A club has introduced a compulsory recovery protocol for its under-18 squad, at some cost.

The protocol as written
#Requirement
1Compulsory five-minute ice bath immediately after every training session and match, all year round.
2Players leave the venue immediately afterwards; there is no cool-down and no debrief.
3A recovery drink is provided after matches only, not after training.
4Training finishes at 9:15 pm on Tuesdays and Thursdays.
5No monitoring of sleep, soreness or fatigue is collected.

Answer five things. Which requirement is most likely to be counterproductive, and in which phase of the year? Which single change would produce the largest improvement, and where does it sit in the hierarchy? What has requirement 2 removed besides a physiological benefit? Rewrite requirement 1 so that it is defensible, and state the condition under which it applies. And finally: what would you monitor to tell whether your changes worked, and what would that monitoring not be able to tell you?

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Lock it in. In one sentence, explain why the same ice bath can be the right decision for a footballer and the wrong one for a strength athlete.

Justify6 marks

Justify the inclusion of physiological and psychological recovery strategies in an athlete's training program.

1
Unpack the verb

Justify asks you to argue for a position with evidence, and to meet the strongest objection rather than avoid it. You are arguing one case, not surveying two.

Plan: state the position, give the strongest reasons in order, deal with the objection, then restate the position as established.

The objection here is that recovery time could be training time. Meet it directly or the justification is incomplete.
Explain5 marks

Explain why inadequate recovery leads to overtraining rather than to further improvement.

1
Unpack the verb

Explain asks for the mechanism by which more training produces less performance. The answer turns on where adaptation actually occurs.

Plan: name the principle, follow the chain from repeated stimulus to declining performance, then answer directly.

The counterintuitive result in the stem is the thing to explain. Do not restate it — account for it.
11
Revisit your thinking
reflection

Go back to card 01. Yes — the same strategy can help one athlete and work against the other, and that is not a trick. The footballer needs readiness in 36 hours on a schedule that cannot change, so trading a little adaptation for reduced soreness is a defensible bargain. The strength athlete needs adaptation, has no fixture for two months, and cold immersion damps part of the response that drives the very change the block exists to produce. Write down whether you had both answers right, and then write the general rule the pair of them demonstrates.

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01
Multiple choice
1 mark each

MC 1. Hydrotherapy refers to:

  • A. any recovery strategy involving fluid intake
  • B. the use of water for recovery, including cold, hot and contrast immersion
  • C. light exercise performed the day after competition
  • D. the replacement of sodium lost through sweat

MC 2. Cold-water immersion is most clearly justified for:

  • A. an athlete with a second match in 36 hours, where readiness matters more than this week's adaptation
  • B. an athlete in week four of an off-season strength block
  • C. an athlete who has not trained for a month
  • D. an athlete whose main problem is sleeping five hours a night

MC 3. Which best describes the clearest physiological justification for a cool-down?

  • A. it removes all lactate from the blood within minutes
  • B. it prevents delayed onset muscle soreness
  • C. it increases muscle temperature to assist tissue repair
  • D. it maintains the muscle pump and venous return, returning the body gradually towards rest

MC 4. An athlete is physically capable of producing normal force but performs poorly after a demanding week, reporting that they cannot concentrate and are "sick of it". The most appropriate strategy is:

  • A. a longer cool-down after each session
  • B. contrast therapy on training days
  • C. psychological recovery, including detachment, relaxation and time away from the sport
  • D. an additional recovery drink after each session

MC 5. A club requires ice baths after every session all year but collects no monitoring and finishes training at 9:15 pm. The strongest criticism is that:

  • A. the protocol applies a small, situational strategy while the largest and cheapest one, sleep, is being undermined by the schedule
  • B. ice baths have no mechanism of action at all
  • C. recovery strategies should never be compulsory
  • D. contrast therapy would be more effective than cold immersion alone
02
Short answer questions
extended response

SA 1. Understand Band 4 Describe two physiological and one psychological recovery strategy, giving the mechanism for each. (4 marks)

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SA 2. Analyse Band 5 Explain why cold-water immersion may be appropriate during a congested fixture period but inappropriate during a strength development block. (5 marks)

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SA 3. Evaluate Band 6 Justify a recovery plan for an athlete in a congested competition period. Refer to physiological and psychological strategies, and address the cost of each choice as well as its benefit. (7 marks)

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📖 Comprehensive answers (click to reveal)

Multiple choice: 1 → B. 2 → A. 3 → D. 4 → C. 5 → A.

Activity 1, indicative answers: 1 → Purpose: readiness for the next match within hours, on a schedule that cannot change. Mechanism: prioritise carbohydrate and fluid immediately after each match to begin glycogen resynthesis and rehydration, and protect sleep in a difficult environment with a wind-down routine, earplugs and an eye mask; cold immersion is a reasonable addition here. Evidence: refuelling and sleep effects are well established; the cold immersion effect on perceived soreness is reasonably consistent but its effect on measured performance is smaller. Cost and alternative: cold immersion needs facilities and time, and its adaptation cost does not matter across two days; the greater risk is that it displaces the refuelling and sleep that matter more. 2 → Purpose: adaptation, since the block exists to change the athlete and there is no fixture. Mechanism: sleep, nutrition and a sensible next-day active recovery; soreness in week four of a new block is expected and is not itself a problem to be treated. Evidence: adaptation is driven by the response to training, and regular cold immersion after resistance work appears to reduce it. Cost and alternative: an ice bath here costs the very thing the block is for, so the right answer is to do less rather than more. 3 → Purpose: sleep after evening competition, which is where this athlete is losing two days. Mechanism: relaxation — slow controlled breathing and progressive muscular relaxation — plus a fixed post-match wind-down and a debrief that closes the performance so rumination does not continue it. Evidence: relaxation reliably lowers physiological arousal; the sleep pathway is the well-supported part. Cost and alternative: essentially free, and it needs to be rehearsed in advance rather than attempted for the first time after a final. 4 → Purpose: motivation and continued participation, not muscle. Mechanism: psychological detachment, time away, social connection and a shortened or varied block; the fatigue here is psychological and no physical strategy addresses it. Evidence: detachment is a strong predictor of feeling recovered across a long season. Cost and alternative: a short reduction in training, which is a real cost, weighed against the athlete stopping altogether — which is the participation argument from Lesson 12. A physical strategy would not solve it because the athlete's problem is not that their muscles cannot produce force.

Activity 2, indicative answers: The most counterproductive requirement is the compulsory year-round ice bath, and specifically in the off-season and pre-season development blocks, where regular cold immersion after resistance training reduces the adaptation those blocks exist to produce. The largest single improvement is moving the 9:15 pm finish earlier, because it sits in tier 1 of the hierarchy: an earlier finish makes an earlier meal and an earlier lights-out possible on two nights a week, and no strategy lower in the list compensates for lost sleep. Requirement 2 has removed more than a cool-down: it has removed the debrief and the only reliable whole-squad communication moment of the week, which is Lesson 10's evaluation and Lesson 12's closure of the performance, so athletes leave carrying an unresolved match. Requirement 1 rewritten: "Cold-water immersion is available, not compulsory, and is used only in congested periods with two competitions within about 72 hours, or during a finals series; it is not used routinely in development blocks." The condition is that readiness rather than adaptation is the purpose for that week. Monitoring: a four-item wellness rating, reported sleep and lights-out time, and morning resting heart rate, each judged on trend and each attached to a decision. What it cannot tell you is whether any specific strategy caused a change, because several things will change at once and the measures are largely self-reported; it can show that the squad's recovery has improved, not which requirement did it.

SA 1 (4 marks): Physiological strategy one [1]: the cool-down, a graded reduction in intensity followed by stretching, which maintains the muscle pump and venous return so blood does not pool in dilated vessels, supports clearance of metabolic by-products, and returns the body gradually towards rest. Physiological strategy two [1]: hydrotherapy, for example cold-water immersion, where cold causes vasoconstriction and lowers tissue temperature, limiting swelling and the inflammatory response and reducing perceived soreness in the following day or two. Psychological strategy [1]: relaxation, such as slow controlled breathing or progressive muscular relaxation, which directly lowers physiological arousal after competition and assists the transition into sleep; psychological detachment or a closing debrief are equally creditable. A fourth mark [1] for a precise mechanism in at least one case, or for noting that psychological fatigue is real and that no physical strategy restores depleted attention and motivation.

SA 2 (5 marks): Mechanism [1]: cold-water immersion causes vasoconstriction and lowers tissue temperature, limiting swelling and blunting part of the inflammatory response to training. The two jobs of recovery [1]: recovery restores readiness for the next performance, and it allows the adaptation that the training disturbance initiated; these can conflict. Congested fixtures [1]: when the next match is in 36 hours and the schedule cannot change, readiness is what matters, reduced soreness and fatigue have real value, and the cost to this week's adaptation is largely irrelevant — so the trade is worth making. Strength block [1]: adaptation is the entire purpose of the block, the inflammatory response is part of the signal that drives it, and regular cold immersion after resistance training appears to reduce the adaptation produced, so the strategy works directly against the goal. The general principle [1]: the correct recovery strategy follows from what the athlete is trying to achieve at that point in the year, which is why this dot point asks you to justify rather than to describe, and why the same strategy is right for one athlete and wrong for another.

SA 3 (7 marks): Purpose stated first [1]: in a congested period the objective is readiness for the next fixture, the schedule cannot be changed, and some cost to adaptation is acceptable because there is no development block to protect. The hierarchy [2]: sleep first, protected with a fixed wind-down and consistent timing, because it has the largest effect and is free; then nutrition and rehydration immediately after each match, which is most urgent precisely when the next effort is soonest; then load management, since reducing or removing a training session between fixtures recovers more than anything applied afterwards. Physiological strategies with mechanism, evidence and cost [2]: a cool-down maintaining venous return and providing the debrief moment, at almost no cost; and cold-water immersion, which reduces perceived soreness and fatigue reasonably consistently through vasoconstriction and reduced tissue temperature, at the cost of facilities, discomfort and some blunting of adaptation — acceptable here because adaptation is not this week's goal. Psychological strategies [1]: relaxation and a wind-down after night matches, because post-competition arousal is a common cause of poor sleep on the most important night; psychological detachment and a closing debrief so athletes are not carrying an unresolved performance into the next fixture. What I would not do, and why [1]: contrast therapy, whose demonstrated benefit beyond cold alone is weaker while its cost in facilities and time is higher; and I would not add any tier-5 strategy while sleep or refuelling remained unaddressed, since that is an ordering problem rather than a recovery problem. A top-band response also notes that most of this evidence rests on perceived recovery rather than measured performance, and says which of the two it is claiming.

01
Consolidate what you have just learned
review

This lesson is the point where several earlier ones converge. The cool-down comes from Lesson 9, the adaptation argument from Lessons 6 and 8, sleep and nutrition from Lessons 14 and 15, relaxation from Lesson 12, and the debrief from Lesson 10. Recovery is not a separate topic so much as the place all of them are cashed in.

Two things to keep. The hierarchy, because it settles almost every practical question about what to add and in what order. And the four-part justification — purpose, mechanism, evidence, cost and alternative — because justify is the verb, and an answer with no cost in it has described a strategy rather than argued for it. Lesson 19 turns to technology, where exactly the same discipline is needed.

Mark lesson as complete

Tick when you've finished the practice and review.